The market for sweet potatoes consists of 1,000 identical firms. Each firm has a short-run total
cost curve of STC = 100 + 100 q + 100q2
, and a short-run marginal cost curve of
SMC=100+200q where q is output. Suppose that sunk costs are 75 and non-sunk costs are 25.
What is the equation of an individual firm’s short-run supply curve?